The emergency medical response (EMR) team in Brookville has instituted a quality improvement program and it makes extensive use of SPC charts. It wants to monitor the response times for emergency calls to make sure they stay around nine minutes on average. The EMR administration staff has randomly timed five emergency calls each month during a 12-month period and collected the following data.

Develop a xˉ-chart in conjunction with an R-chart to monitor the response times and indicate if the process appears to be in control. If the EMR team cannot consistently meet its target, what kind of actions (i.e., improvements) might it need to make to achieve itstarget?

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